An eosinophil count is a blood test that measures the quantity of eosinophils in your body. Abnormal eosinophil levels are often discovered as part of a routine complete blood count (CBC) test.
Doctor may discover abnormal eosinophil levels when a white blood count differential is performed. A white blood count differential test is often done alongside a complete blood count (CBC) and determines the percentage of each kind of white blood cell present in your blood. This test will show if you have an abnormally high or low count of white blood cells.
The serum reference ranges of eosinophils are as follows: Eosinophils blood (%): 0.0-6.0 (This range may vary slightly in different laboratories.) Eosinophil blood count (absolute): 30-350. The percentage of eosinophils is multiplied by the white blood cell count to give the absolute eosinophil count.
